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Manual Notice
| Bridge Inspection Manual |
TxDOT Manual System
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Manual Notice 2002-1
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1.
Introduction
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1.
About this Manual
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Purpose
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Feedback
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Abbreviations
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2.
History of Bridge Inspection
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1.
Initial Reasons for Bridge Inspection
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Beginning of Bridge Inspection
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First Texas Bridge Inspection Program
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2.
Primary References
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Major Standards, Manuals, and Technical Advisories
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3.
AASHTO Inspection Manuals
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1970 and 1974 AASHTO Manuals
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1978 AASHTO Manual
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1983 AASHTO Manual
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AASHTO Interim Specifications
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1994 Rewrite of AASHTO Manual
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Current Status of 1994 AASHTO Manual
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1994 AASHTO Manual Omissions and Inconsistencies
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4.
Federal and State Inspection Procedures
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1991 Manual 90
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Texas Bridge Inspection Procedures
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3.
Qualifications and Responsibilities of Bridge Inspection Personnel
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1.
Requirements
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General Requirements
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FHWA Requirements
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AASHTO Requirements
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TxDOT Requirements
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2.
TxDOT Bridge Inspection Personnel
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General Position Requirements
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Specific Position Requirements
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Division Manager of Bridge Inspection Operations
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Division Bridge Inspection Supervisors/Engineers or District Bridge Inspection Coordinators
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Division or District Bridge Inspection Engineers/Specialists
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Division or District Bridge Inspection Staff Specialists/Technicians
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3.
Bridge Inspections by Consultants
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General Requirements
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Routine Bridge Inspections
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Complex Bridge Inspections
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Pre-certification Procedures for Consultants
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4.
Use of the Consultant Pool
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Request for Consultant Inspection
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Work Authorization Issuance
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Managing Consultant Bridge Inspections
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Completion of Work Authorization
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4.
Field Inspection Requirements
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1.
Types of Bridge Inspection
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Overview
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2.
Initial Inspections
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Overview
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3.
Routine Inspections
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Overview
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Inspection Equipment
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Interim Inspections
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4.
Damage Inspections
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5.
In-Depth Inspections
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Reasons for In-Depth Inspections
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Underwater Inspections
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Underwater Inspection Methods
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Levels of Underwater Inspection
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Underwater Structural Elements
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Underwater Inspection Devices
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Underwater Structural Materials
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Fracture-Critical Inspections
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History of Fracture Critical Considerations
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Fatigue Failures
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Fracture-Critical Members
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Redundancy
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Inspection Procedures for FC Members
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Fatigue and Fatigue Fracture
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Fatigue-Prone Details
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Weld Details
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Fatigue in Secondary Members
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Proper Welding and Repair Techniques
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FC Inspection Techniques
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6.
Special Inspections
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Overview
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5.
Ratings and Load Posting
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1.
Overview
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2.
Condition Ratings
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Definition of Condition Ratings
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Recording Condition Ratings
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Assigning Condition Ratings
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3.
Appraisal Ratings
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Definition of Appraisal Ratings
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Recording Appraisal Ratings
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4.
Load Ratings
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Definition of Load Ratings
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Determination of Load Ratings
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Inventory Rating and Design Load Considerations
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THD Design Supplement No. 1
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Customary Rating Procedures
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Rating Concrete Bridges with No Plans
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Examples of Rating Concrete Bridges with No Plans
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Ratings for Unusual Bridges
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H- and HS-Load Ratings
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5.
Legal Loads and Load Posting
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Definition of State Legal Loads
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Load Posting
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Procedures for Changing On-System Bridge Load Posting
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Procedures for Emergency On-System Bridge Load Posting
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Closure of Weak Bridges
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Off-System Bridge Closure Procedures
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6.
Routing and Permits
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1.
Overview
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2.
Role of District Permit Officers, District Bridge Inspection Coordinators, and the MCD
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3.
Permits
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OverHeight and OverWidth Permits
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Over-weight Permit Loads
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Superheavy Loads
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Other Differences Between Overweight Permits and Operating Rating
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Overloads on Posted or Substandard Bridges
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Pre- and Post-Move Inspection
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4.
Example Comparison of Inventory, Operating, and Permit Loads
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Typical Continuous I-Beam Bridge
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Rating Analysis Steps
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Results for I-Beam Bridge
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Discussion of the Analysis Comparisons
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7.
Bridge Programming
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1.
Basis for Bridge Rehabilitation or Replacement
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Overview
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2.
Federal Bridge Program
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Funding Classifications
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Qualification for Rehabilitation or Replacement
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Texas Eligible Bridge Selection System
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Structural Deficiency
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Functional Obsolescence
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3.
Sufficiency Ratings
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Calculation of Sufficiency Ratings
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4.
Bridge Management System
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Overview
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8.
Bridge Records
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1.
Overview
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Summary
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2.
Definition of Terms
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3.
Consultant Requirements
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General Requirements
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Tools and Safety Equipment
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Email and Correspondence
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Coordination with TxDOT District
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4.
Coding Guidelines
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Summary of Instructions (for on-and off-system bridges)
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Multiple-Pipe Culverts (for on- and off-system bridges)
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Data Quality (for on-and off-system bridges)
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Elements Data (only for on-system bridges)
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5.
Forms
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General Forms Information
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Bridge Inspection Record, Old Form 1085 (for on- and off-system bridges)
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Bridge Appraisal Worksheet, Old Form 1387 (for on- and off-system bridges)
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Bridge Structural Condition History (for on- and off-system bridges)
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Bridge Inspection Follow-Up Action Worksheet (only for on-system bridges)
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Bridge Inventory Record, Old Form 536 (for on- and off-system bridges)
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Bridge Inventory Record Revision (for on- and off-system bridges)
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Channel Cross-Section Measurements Record (for on- and off-system bridges)
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Underclearance Sketch (for on- and off-system bridges)
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Bridge Summary Sheet (only for off-system bridges)
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Recommended Change in Bridge Load Zoning, Form 1083R (only for on-system bridges)
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6.
Calculations
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General Calculation Requirements
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On-System Bridge Calculations
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Off-System Bridge Calculations
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7.
Data Submittal
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General Data Submittal Requirements (for on- and off-system bridges)
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Photographs (for on- and off-system bridges)
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Electronic Media (for on- and off-system bridges)
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Presentation of Documents (for on- and off-system bridges)
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Original and Duplicate Files (for on-system bridges)
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Additional Files (for off-system bridges)
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Summary Reports (for off-system bridges)
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Summary of New Load-Posting Materials (for off-system bridges)
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Scour Records and Reports (for on- and off-system bridges)
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8.
The Bridge Folder
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Folder Information (for on- and off-system bridges)
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Folder Assembly (for on- and off-system bridges)
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A.
State and Federal Regulations
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B.
Bridge Inspection Data
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1.
Creating and Submitting Transactions for Update
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Introduction
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Transactions Created by Consultants
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Transactions Created by Districts
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2.
Importing Mainframe Bridge Inspection Data into Microsoft Access
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Procedure
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3.
Bridge Inspection Database
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Data Structure
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Inspection Database Blocked Fields (as of January, 2000)
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4.
Error Messages for File Edit Program
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Error Messages
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C.
Links to Coding Guidelines
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Index
Bridge Inspection Manual
July 2002
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